Measured load spectra of the bearing in high-speed train gearbox under different gear meshing conditions

Hou, Yaxin; Wang, Xi; Sun, Shouguang; Que, Hongbo; Guo, Rubing; Lin, Xinhai; Jin, Siqin; Wu, Chengpan; Zhou, Yongqin; Liu, Xiaolong

doi:10.1007/s40534-022-00282-1

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…It has been found that hunting motions (self-excited oscillation due to instability) significantly affect the vibration and stress of car bodies (Li, Wu, Liu, Wu, & Zeng, 2022) and bogie frames (Qu, Wang, Zhang, Li, & Wei, 2021) and further reduce their fatigue life. Meanwhile, wheel polygonization (periodic out-of-roundness) has been found to affect the vibration and stress of bogie frames (Sun, Wei, Liu, Dai, Qu, & Zhao, 2022), wheel axles (Zhang, Wang, Zhang, Zhu, & Yang, 2021) and bearings (Wang, Allen, Mei, Wang, Yin, & Zhang, 2019; Hou et al. , 2023) and further reduce their fatigue life.…”

Section: Introductionmentioning

confidence: 99%

Theory and practice for assessing structural integrity and dynamical integrity of high-speed trains

Zhang,

Zeng,

Song

et al. 2024

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PurposeThe safety and reliability of high-speed trains rely on the structural integrity of their components and the dynamic performance of the entire vehicle system. This paper aims to define and substantiate the assessment of the structural integrity and dynamical integrity of high-speed trains in both theory and practice. The key principles and approaches will be proposed, and their applications to high-speed trains in China will be presented.Design/methodology/approachFirst, the structural integrity and dynamical integrity of high-speed trains are defined, and their relationship is introduced. Then, the principles for assessing the structural integrity of structural and dynamical components are presented and practical examples of gearboxes and dampers are provided. Finally, the principles and approaches for assessing the dynamical integrity of high-speed trains are presented and a novel operational assessment method is further presented.FindingsVehicle system dynamics is the core of the proposed framework that provides the loads and vibrations on train components and the dynamic performance of the entire vehicle system. For assessing the structural integrity of structural components, an open-loop analysis considering both normal and abnormal vehicle conditions is needed. For assessing the structural integrity of dynamical components, a closed-loop analysis involving the influence of wear and degradation on vehicle system dynamics is needed. The analysis of vehicle system dynamics should follow the principles of complete objects, conditions and indices. Numerical, experimental and operational approaches should be combined to achieve effective assessments.Originality/valueThe practical applications demonstrate that assessing the structural integrity and dynamical integrity of high-speed trains can support better control of critical defects, better lifespan management of train components and better maintenance decision-making for high-speed trains.

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Section: Introductionmentioning

confidence: 99%

Theory and practice for assessing structural integrity and dynamical integrity of high-speed trains

Zhang,

Zeng,

Song

et al. 2024

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“…They showed that the force increased with vibration acceleration, rotation speed, and radial load. Suzuki et al 8 and Hou et al 9 measured the rolling element loads of pinion bearings for railway gear units under actual traction torque. These studies reveal the vibration and force interactions of the components inside the bearing.…”

Section: Introductionmentioning

confidence: 99%

Comparison of performance between tapered and cylindrical roller bearings for pinion of gear unit subjected to rotation test

Takahashi,

Suzuki,

Kikawa

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Tapered roller bearings are often used to support pinions in gear units of electric trains. On the other hand, recently, the application of cylindrical roller bearings with ribs has also been proposed, in which the internal clearance changes little depending on the operating conditions. This study aims to elucidate the effect of differences in just these two types of pinion bearings on the performance of gear units and thereby verify the applicability of cylindrical roller bearings with ribs to railway gear units. Tapered roller bearings and cylindrical roller bearings with ribs of the same dimensions were subjected to rotational tests in the same gear unit. The results showed that the effects of the atmospheric temperature on the maximum temperature, the maximum rate of temperature rise, and the torque of the bearings were not significantly different between the tapered roller bearings and the cylindrical roller bearings with ribs. As the atmospheric temperature decreases, the maximum temperature decreases, and the maximum rate of temperature rise and the torque increase. On the other hand, the endplay values had a significant effect on these values in the tapered roller bearings, while they had little effect on the cylindrical roller bearings with ribs.

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A trailer car dynamics model considering brake rigging of a high-speed train and its application

Wang

Yang

et al. 2023

Rail. Eng. Science

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Brake systems are essential for the speed regulation or braking of a high-speed train. The vehicle dynamic performance under braking condition is complex and directly affects the reliability and running safety. To reveal the vehicle dynamic behaviour in braking process, a comprehensive trailer car dynamics model (TCDM) considering brake systems is established in this paper. The dynamic interactions between the brake system and the other connected components are achieved using the brake disc–pad frictions, brake suspension systems, and wheel–rail interactions. The force and motion transmission from the brake system to the wheel–rail interface is performed by the proposed TCDM excited by track irregularity. In addition, the validity of TCDM is verified by experimental test results. On this basis, the dynamic behaviour of the coupled system is simulated and discussed. The findings indicate that the braking force significantly affects vehicle dynamic behaviour including the wheel–rail forces, suspension forces, wheelset torsional vibration, etc. The dynamic interactions within the brake system are also significantly affected by the vehicle vibration due to track irregularity. Besides, the developed TCDM can be further employed to the dynamic assessment of such a coupled mechanical system under different braking conditions.

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Measured load spectra of the bearing in high-speed train gearbox under different gear meshing conditions

Cited by 8 publications

References 31 publications

Theory and practice for assessing structural integrity and dynamical integrity of high-speed trains

Theory and practice for assessing structural integrity and dynamical integrity of high-speed trains

Comparison of performance between tapered and cylindrical roller bearings for pinion of gear unit subjected to rotation test

A trailer car dynamics model considering brake rigging of a high-speed train and its application

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